Bill is totally right. The whole key to an epoxy paint finish and longevity is prep. Any extra hours for prep will not be wasted.
I have had several floors done with epoxy and always the professionals have spent many hours of prep emphasizing it's importance.
Everyone should have a garage like Bill Wells. The most perfect car (guy hangout) anyone could want. Check out his gallery picture. Last I herd his wife uses the floor to roll pie crust. She figures that it is nicer than her kitchen counter!
The ultimate garage by Bill Wells!